Pneumatic gasket



Dec. 19, 1922. 1,439,452.

- P. M. SHAW.

PNEUMATIC GASKET.

man rmz. 1921.

'lll/11111111Ilz/111111111 /CK MSH/q Patented Een. i9, vl922.

entre FBEDERCK M. SHAW, 0F GHCAGrO, LLINOIS.

rNnUMATrc Gesknr.

Application filed February 26, 1921. Serial No. 448,231.

ya citizen of the United States, residing at Chicago, in the county of Cook and State ot' Illinois, have invented certain new and useful Improvements in Pneumatic Gaskets, of which the following is a specification, reiteronce being had to the accompanying drawings, and to the reference characters marked thereon, which form al part of this specification.

This invention relates to gaskets used tor packing joints. In the use of large appara@ tus, as for example a digestor or condenser having a swinging door orl closure to its apertured end, great diiiiculty has beeny eX- perienced in properly packing the joint because of the size of the aperture and ot-the pressure ot the material upon the closure or door.

The principal object of my invention is t0 produce such a. packing or gasket as will relieve the particular objection noted and which will be relatively cheap in construction, simple in operation and which willnot get out of order. Also one which may be adjusted, so to speak, from time to time, to prevent leakage.

The invention consists in the devices and combination ot devices herein illustrated, described and claimed.

ln the drawings:

Fig. l illustrates in cross section an appa- .ratus to which my improved gasket has been applied.

Fig. 2 is a plan view, enlarged, of the improved gasket, detached, and partly broken away.

F 3 is a vertical sectional view.

Fig. 4 is also a vertical sectional view showing certain details.

In that form of the invention illustrated in the drawings, the gasket is represented as a whole by the letter A. B represents a suitable tubular apparatus or container, such for example as a .digestor or condenser, to which the gasket A is applied. The gasket A comprises two mai-n parts, a tubular flexible insert member l and a tubular resilient outer or casing member 2. rlhe outer member 2 is provided at a convenient point with an aperture, lindicated at 3. One end ot the inner member is closed, as shown at 4:. The other end 5 of the inner member l is adapted to project through the aperture 3 ot the casing l and is provided with a suitable valve closure 6, for water or air connection. The casing l is arranged in ring form, with the end fl ot the inner member in juxtaposition to the other part of the inner member at or near the end 5. The abutting ends 8 of the casing l are joined together.

9 is a door or other closure, pivotally mounted` at l0, to the condenser B, and adapted to close the aperture or mouth 11 of the apparatus. An interiorly directed liange 12 affords on its lower :tace a bearing for the door or closure 9, and between the flange l2 and the door 9, the gasket A is placed. A suitablev annular groove or recess 1s complementally arranged 1n the face of the door 9 and the lower surface of theflange 12. The gasket A will lie in the recess in such manner that the valve end 5, 6, oi the inner casing, is available for manipulation when it is desired to adjust the gasket.

ln practice, l prefer to make the outer casing ot' resilient, but relatively sti tubular material, such as that of which the familiar rubber hose is made. I prefer also to secure the abutting ends 8, 8, together by vulcanization, which is a process so well known as to require n0 description here. I also prefer to construct the insert member 1 of more flexible or resilient and eXpansible material, such as a lighter grade of hose or rubber tubing. The valved part and end 4 may be secured in position by vulcanization in a familiar manner.

The insert member l may be expanded so a's to completely iill the tube of the outer casing, by placing any suitable air or water forcing apparatus upon the valved end 6. The particular form ot air or water inlet valve apparatus indicated by the letter 6 is not essential, and therefore details are omitted. j

lt has been found after somewhat extensive use of this two-member tubulark gasket A, in large apparatus such as the condenser B, where the opening or aperture ll is four or iive feet in diameter, that a pretectly airtight packing is atlorded by the construction herein shown and described. l/Jhile changes may be made as to some-ot the details, yet the form and arrangement herein illustrated are recommended as highly satisfactory in use.

I claim as my invention:

l. A gasket comprising a tubular, resilient. but relatively stift outer casing, an aperture through one wall thereof, and a tubular,

iieXible insert in the easing, one end ot Which protrudes through said aperture, the other end of the insert being closed.

2. A gasket comprising a tubular, resilient', but relatively stili" outer Casing, an aperture through one Wall thereof, and a tubular, flexible insert in the casing, one end o1"- which protrudes through said aperture, the other end of the insert being closed, said insert and said easing being inade of rubber.

. 3. A gasket comprising a' tubular, resilient, but relatively stili'1 outer easing, an

aperture through one -wall thereof, and a.

tubular, flexible insert in the easing, one end of which protrudes through said aperture, the other-'endet the insert being closed, and secured by vuleanization to rthe insert near the projecting part thereof.` V

4t. gasket comprising a tubular, resilient, but relatively stiff outer easing, an aperture through one Wall thereof, and a tubular, flexible insert in the easing, one end ot which `protrudes through said aperture, a valved closure for said protruding end, the other yend of the insert being closed.

5. A gasket comprising a tubular, resilient, but relatively stiff outer easing, an aperture through one Wall thereof, and a tubular, inflatableinsert in the easing,`one end of Which protrudes through said aperture,the other end of the insert being Closed.

6. A gasket comprising a tubular, resilient, but relatively stiff outer easing, an aperture through one Wall thereof, and a tubular7 inflatable insert in the casing, one end of lwhich protrudes through said aperture, a valved closure for said protruding end7 the other end of the insert being Closed.

7. A gasket comprising a relatively stiff, tubular, rubber outer member, such as a hose, bent into a ring` With its abutting ends joined by vuleanization and hzuing;` an aperture through its `Wall, a resilient, expansible rubber ineinber inserted Within said outer rneniber, with one end closed and its other end projecting through said aperture and a valve in said projecting end of `the inner member, the two inernbers' being suitably held secured together by vuleanization.

ln testimony that l elaiin the foregoing as iny invention l affix' my signature, in the presence of two Witnesses, this 17th day of February7 i921.

FREDERCLL M. Sl'lAV. lllitnesses W. S. SHAW,

C. G. SAUNnnBs. 

